she's the tampa, florida, woman, who is said to have received threatening e-mails from petraeus's mistress. a pentagon official says allen and kelly exchanged up to 30,000 communications between 2010 and 2012. it's unclear if they were involved in sexual matters or classified information. allen will remain the u.s. commander in afghanistan for now. but these latest developments only serve to widen the scandal that has gripped the nation's capital since friday. tara mergener is in washington with more. what's the latest there? >> reporter: good morning to you. that's right. another twist in this drama. defense secretary leon panetta ordered a pentagon investigation on monday involving one of the u.s. military's biggest names. general john allen, the man who succeeded david petraeus as head of the international forces in afghanistan, is now linked to the fbi investigation involving his predecessor. >> i want to thank you all so much for being here this morning. >> reporter: secretary of defense leon panetta confirms department of defense is investigating allen, and a senior u.s. defense offi